CVE-2026-15100: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in wpxpo Post Grid Gutenberg Blocks – PostX
The Post Grid Gutenberg Blocks – PostX WordPress plugin up to version 5.0.32 is vulnerable to stored cross-site scripting (XSS) via the 'searchnoresult' block attribute. Authenticated users with contributor-level access or higher can inject malicious scripts that execute when an editor or administrator previews the affected post. This vulnerability arises from insufficient input sanitization and output escaping. It poses a risk in cross-privilege scenarios, potentially allowing script execution in higher-privileged user sessions.
AI Analysis
Technical Summary
CVE-2026-15100 is a stored cross-site scripting vulnerability in the Post Grid Gutenberg Blocks – PostX WordPress plugin affecting all versions up to and including 5.0.32. The vulnerability is due to improper neutralization of input in the 'searchnoresult' block attribute, allowing authenticated contributors or higher to inject arbitrary JavaScript code. When a higher-privileged user previews a post containing the malicious attribute, the script executes in their browser context. This vulnerability is classified under CWE-79 and has a CVSS 3.1 base score of 6.4, indicating a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. No official patch or remediation guidance is currently documented.
Potential Impact
An attacker with contributor-level access can inject persistent malicious scripts into posts via the vulnerable block attribute. These scripts execute in the browser sessions of editors or administrators who preview the compromised posts, potentially leading to unauthorized actions or data exposure within the WordPress admin context. The vulnerability does not affect availability but impacts confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and avoid previewing posts from untrusted contributors. Monitor for updates from the plugin vendor or WordPress security advisories for a patch or official mitigation.
CVE-2026-15100: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in wpxpo Post Grid Gutenberg Blocks – PostX
Description
The Post Grid Gutenberg Blocks – PostX WordPress plugin up to version 5.0.32 is vulnerable to stored cross-site scripting (XSS) via the 'searchnoresult' block attribute. Authenticated users with contributor-level access or higher can inject malicious scripts that execute when an editor or administrator previews the affected post. This vulnerability arises from insufficient input sanitization and output escaping. It poses a risk in cross-privilege scenarios, potentially allowing script execution in higher-privileged user sessions.
CVSS v3.1
Score 6.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-15100 is a stored cross-site scripting vulnerability in the Post Grid Gutenberg Blocks – PostX WordPress plugin affecting all versions up to and including 5.0.32. The vulnerability is due to improper neutralization of input in the 'searchnoresult' block attribute, allowing authenticated contributors or higher to inject arbitrary JavaScript code. When a higher-privileged user previews a post containing the malicious attribute, the script executes in their browser context. This vulnerability is classified under CWE-79 and has a CVSS 3.1 base score of 6.4, indicating a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. No official patch or remediation guidance is currently documented.
Potential Impact
An attacker with contributor-level access can inject persistent malicious scripts into posts via the vulnerable block attribute. These scripts execute in the browser sessions of editors or administrators who preview the compromised posts, potentially leading to unauthorized actions or data exposure within the WordPress admin context. The vulnerability does not affect availability but impacts confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and avoid previewing posts from untrusted contributors. Monitor for updates from the plugin vendor or WordPress security advisories for a patch or official mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-08T16:48:20.982Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a62de069c2644c7f835c495
Added to database: 07/24/2026, 03:37:42 UTC
Last enriched: 07/31/2026, 15:23:26 UTC
Last updated: 09/06/2026, 14:14:47 UTC
Views: 81
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